VIVA OFFICE High Back Bonded Leather Office Task Chair with Padded Headrest and Armrests Ergonomic bonded leather office chair with pneumatic seat height adjustment and built-in Lumbar Support for added comfort Simple pneumatic controls let you raise or lower your seat and rock back in your chair.Pulling out on the control handle, which allows your chair to tilt back, or sit forward and push the control handle in to prevent it from tilting Waterfall seat design eliminates leg fatigue High quality Nylon base and Nylon casters added to office working flexibility Weight capacity: 250 pounds. We provide component-exchange in two years